TripleSpec is a Near-infrared Spectrograph
covering .095 to 2.46μm, with a Spectral Resolution
of 2500-to-2700. One is installed on
Hale Telescope and another at the ARC 3.5m telescope
at the Apache Point Observatory (APO).
I believe it is called "TripleSpec" because after
a Grating spreads the light by Wavelength,
it is passed through three prisms to disperse it
in the crosswise direction.
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Cross Dispersion Spectrograph